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16 changes: 12 additions & 4 deletions NodeGraphQt/base/graph.py
Original file line number Diff line number Diff line change
Expand Up @@ -1727,8 +1727,12 @@ def _serialize(self, nodes):
serial_data['graph']['pipe_style'] = self.pipe_style()

# connection constrains.
serial_data['graph']['accept_connection_types'] = self.model.accept_connection_types
serial_data['graph']['reject_connection_types'] = self.model.reject_connection_types
serial_data['graph']['accept_connection_types'] = {
k: list(v) for k, v in self.model.accept_connection_types.items()
}
serial_data['graph']['reject_connection_types'] = {
k: list(v) for k, v in self.model.reject_connection_types.items()
}

# serialize nodes.
for n in nodes:
Expand Down Expand Up @@ -1798,9 +1802,13 @@ def _deserialize(self, data, relative_pos=False, pos=None):

# connection constrains.
elif attr_name == 'accept_connection_types':
self.model.accept_connection_types = attr_value
self.model.accept_connection_types = {
k: set(v) for k, v in attr_value.items()
}
elif attr_name == 'reject_connection_types':
self.model.reject_connection_types = attr_value
self.model.reject_connection_types = {
k: set(v) for k, v in attr_value.items()
}

# build the nodes.
nodes = {}
Expand Down
2 changes: 1 addition & 1 deletion NodeGraphQt/base/model.py
Original file line number Diff line number Diff line change
Expand Up @@ -245,7 +245,7 @@ def add_port_accept_connection_type(
):
"""
Convenience function for adding to the "accept_connection_types" dict.
If the node graph model is unavailable yet then we store it to a
If the node graph model is unavailable, yet then we store it to a
temp var that gets deleted.

Args:
Expand Down